Respuesta :

mhanifa

Answer:

  • 3a + 4

Step-by-step explanation:

Given the function

  • f(x) = 3x + 1,

Substitute x with a + 1

  • f(a + 1) = 3(a+1) + 1 =
  • 3a + 3 + 1 =
  • 3a + 4
This is really simple if you get it the answer is 3a+4

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